Not long ago I created a demonstration that highlighted the new support for the PowerVM platform introduced in WebSphere CloudBurst 1.1. In that demonstration I showed how you can deploy to a PowerVM cloud by defining a new cloud group that interfaces with a VMControl instance to manage a pSeries cloud environment. However, in the demo I did not go into much detail about the components of a pSeries cloud used with WebSphere CloudBurst.
Since pictures help me out a lot, I thought I’d start the discussion with an image that depicts the components in the pSeries cloud environment and the workflow when using WebSphere CloudBurst to deploy systems to this environment.
The workflow begins when a user requests the deployment of a pattern and targets that deployment for a PowerVM cloud group. WebSphere CloudBurst first checks that the cloud group contains the compute resources necessary to deploy the pattern. After the resource checks are complete, WebSphere CloudBurst decides where to place each virtual machine that will be created from deployment using its intelligent placement algorithm. No matter the type of the cloud environment being utilized the appliance retains control over placement decisions, thus ensuring the virtual system has been deployed in a way that optimizes both performance and availability.
Once the placement decision has been made, WebSphere CloudBurst communicates with the VMControl instance, which in turn instructs the Hardware Management Console (HMC) to create LPARs on the targeted pSeries machines. These LPARs will host the virtual machines that represent the WebSphere Application Server nodes in your virtual system. After the LPARs have been created, WebSphere CloudBurst leverages VMControl to instruct the Network Installation Manager (NIM) to deploy virtual images to the necessary LPARs.
When the LPARs have been created and the virtual images have been deployed to those LPARs, the common process of virtual system creation can proceed. This process includes starting virtual machines, starting WebSphere Application Server components, and running any user-supplied scripts. The end result is a ready to use, virtualized WebSphere Application Server cell running on the PowerVM hypervisor platform.
I hope this provides a nice overview of the underlying environment when PowerVM hypervisors are used with WebSphere CloudBurst. As for those users who are not WebSphere CloudBurst cloud administrators, the information above is nice to know but not necessary. The user experience with respect to building, deploying, and managing your virtualized application environments with WebSphere CloudBurst is consistent regardless of the type of your cloud platform.
This week is a busy week getting ready for IMPACT next week. I'm looking forward to the conference, and I thought I would share a few things on my agenda. Naturally, my agenda includes the sessions I am running:
10:15 AM - 11:30 AM
TDC-2973A Meet the Experts and Demo: WebSphere Cloudburst Appliance
Come and meet the experts responsible for the WebSphere Cloudburst Appliance, and see a demo of its functionality in this informal setting.
1:30 PM - 4:30 PM
TDC-1369A Lab: Working with the WebSphere CloudBurst Appliance
Come and work hands on with the WebSphere CloudBurst Appliance to create your own WebSphere application environments in a cloud. The lab will guide you through using WebSphere CloudBurst to create and deploy WebSphere virtual systems in a private cloud. Youll learn how to create custom WebSphere and DB2 topologies by extending virtual images, creating patterns, and using scripts. You'll get a chance to work with the easy to use Web 2.0 user interface. Youll be amazed at the ease of use WebSphere CloudBurst brings to configuring, deploying, and running WebSphere environments in a private cloud.
1:30 PM - 2:45 PM
TAD-1370A Simplifying Development using Rational Tools with WebSphere CloudBurst Appliance
Are you looking to really simplify your WebSphere development and test environments - including never needing to install or configure WebSphere again? If so, come hear about how you can use the IBM WebSphere CloudBurst Appliance along with Rational tools like the Rational Automation Framework for WebSphere and Rational Software Architect to create a dynamic development and test cloud. With the integration of WebSphere CloudBurst and selected Rational tools, you worry about the application development, while WebSphere CloudBurst worries about the WebSphere infrastructure and your cloud resources. Come to this combination of presentation and demo to see how easy development and testing can be.
In addition to these, there are some other exciting WebSphere CloudBurst sessions on tap:
3:45 PM - 5:00 PM
TDC-2498A WebSphere CloudBurst Appliance at Lowe's
Lowe's is evaluating WebSphere CloudBurst Appliance (WCA) as a tool for managing their X86 and PowerVM environments in a cloud fashion. Come to hear how Lowes believes WCA fits into an enterprise companys cloud strategy. This session will discuss the work done at Lowes so far and the use cases planned for WCA at Lowe's. Attendees can understand how WCA is delivering value in an adopter's environment.
5:15 PM - 6:30 PM
TDC-1368A Introduction to WebSphere CloudBurst Appliance
The WebSphere CloudBurst Appliance delivers capabilities to create, monitor, and maintain private WebSphere clouds. It provides you the capability to quickly and simply create, deploy, and maintain virtualized WebSphere application environments running on a heterogeneous, shared pool of resources that make up your cloud. In this session, we will provide an overview of the WebSphere CloudBurst Appliance features and benefits and demonstrate the latest capabilities.
1:30 PM - 2:45 PM
TDC-1758A Building Private Clouds with WebSphere CloudBurst Appliance
Come join us as we discuss how the WebSphere development and test organization built a large private cloud from the ground up using WebSphere CloudBurst Appliance. We have lowered the entry requirement to get a meaningful WebSphere Application Server development environment (days down to minutes), saved costs by improving hardware utilization while simplifying our management of physical resources and topologies. We will discuss best practices for adhering to security requirements, creating reusable automation scripts for your applications and configurations and maintaining your cloud. Allow us to share our experience in using WebSphere CloudBurst Appliance to create our automated regression infrastructure, and to provide up-to-date deployments to our test team.
4:45 PM - 6:00 PM
TDC-1946A BSkyB's Experiences using the WebSphere CloudBurst Appliance V1.1
At Impact 2009, IBM announced the launch of the WebSphere CloudBurst Appliance. BSkyB witnessed this launch and were very keen to understand the device's potential. This presentation details their experiences to date, and their vision for incorporating the appliance into their organization. Details will include bringing the device in house, setting up the cloud, and doing deployments. BSkyB will also discuss the customisation process, and how they used the extend / capture and scripting capabilities to add content including WebSphere Process Server. The presenters will share their lessons learned as they continue their journey using WebSphere CloudBurst for agile environment provisioning and simplified WebSphere Administration.
10:15 AM - 11:30 AM
TDC-2063A Panel: WebSphere CloudBurst Appliance Customers Describe their Experiences
A panel of several customers who have adopted WebSphere CloudBurst Appliance will discuss their experiences with the product, and answer questions related to their experiences.
9:00 AM - 10:15 AM
TDC-1884A Using WebSphere CloudBurst Appliance in a PowerVM Environment
This session will discuss the concepts and issues associated with implementing the WebSphere CloudBurst Appliance (WCA) in a PowerVM environment. The components of the implementation including VMControl, IBM System Director, HMC, NIM. and WebSphere CloudBurst will be explained, along with their relationships and functions. This in-depth session will also provide best practices from early adopter deployments and performance experiences.
1:30 PM - 2:45 PM
TBR-2491A Customizing a Private Cloud for WebSphere Process Server Applications
Every enterprise has a unique set of standards when it comes to the applications that are deployed and the qualities of service that are required for those applications. Come to this session to learn some of the best practices around pattern customization and maintenance of the images in the WebSphere CloudBurst Appliance for your specific requirements. We will use the creation of a WebSphere Process Server double gold topology pattern to show these best practices. This session will also cover the practices involved with maintaining these patterns.
As you can see there is going to be quite a bit of activity around WebSphere CloudBurst at IBM IMPACT 2010. The lists above is not all encompassing either. Visit the IBM Impact site for more information. If you are registered to attend, be sure to visit the agenda builder website for the conference.
Virtual image parts play a huge role in WebSphere CloudBurst. When crafting your own customized patterns, you include anywhere from 1 to n parts from as many different virtual images as is necessary. These parts represent the different node types or personalities within a given Hypervisor Edition image, and form the basis of your pattern. When you deploy a pattern, such as the one pictured below, WebSphere CloudBurst creates a distinct virtual machine for each part.
This means that after deploying the above WebSphere Application Server pattern, you will have four virtual machines comprising your virtual system. This gives you a clean separation of concern by providing a unique container for each of your application environment nodes. This can attribute to performance optimization, increased availability, and much more. However, this approach is not suitable to all use cases. In some scenarios, especially when trying to control costs and increase consolidation, you may want to deploy a multi-node WebSphere Application Server environment within a single virtual machine. Based on what I showed you above, you might think our approach in WebSphere CloudBurst makes this impossible, but you would be overlooking an important component of patterns.
That component is of course the second building block of patterns... script packages. As you probably know, script packages allow you to supply just about any customization you want. In the case that you want a single virtual machine to host a number of WebSphere Application Server nodes, maybe even an entire cell, all you need to do is supply a script package that constructs the necessary nodes during deployment. In fact, you don't even have to write the script package. You can use the free sample in our samples gallery. As seen in the pattern below, you include this script package on a sole deployment manager part in a pattern.
The script script package provides parameters that define the node name, number of custom nodes, and number of web server nodes you want in your cell. During the deployment process, the script takes this information and constructs the cell you define. This includes creating the custom and web servers nodes and federating the custom nodes, thus completing the creation of your WebSphere Application Server cell. In this case, the script package provides deployment flexibility that is sometimes a necessity, and it is just another example of the many degrees of flexibility enabled by the script package design.
I should point out that a part in a pattern does not always map to a single node. For instance, in the case of WebSphere Process Server, there is a part that represents a complete, multi-node golden topology encapsulated within a single virtual machine. However, if you find yourself using images that do not contain these multi-node parts, rest easy knowing script packages provide you the flexibility you need.
When I talk to users familiar with both WebSphere CloudBurst and the IBM Systems Director VMControl offering, there is sometimes a bit of confusion. It is not surprising. Both WebSphere CloudBurst and IBM Systems Director VMControl allow users to create and manage virtualized environments. That leads us to an oft-asked question: What is the difference between WebSphere CloudBurst and IBM Systems Director VMControl?
The simple answer is that the difference in the two offerings is the degree to which they are purpose-built. IBM Systems Director VMControl equips users with broadly applicable capabilities to create and manage environments consisting of virtual machines. These capabilities extend to PowerVM, z/VM, VMware, and Microsoft Hyper-V hypervisor platforms. IBM Systems Director VMControl is not necessarily knowledgeable about the software running in the virtual machine, but it does allow the user to manage that asset effectively.
Compare and contrast that with the capabilities provided by WebSphere CloudBurst. The appliance also enables users to create and manage environments consisting of virtual machines. The difference is that WebSphere CloudBurst is purpose-built to provide you with the ability to create, deploy, and manage virtualized WebSphere environments quickly and easily.
What does that mean? Well, on one hand it means that WebSphere CloudBurst does not treat the virtual machines it creates like a black box. In fact, it knows quite a bit about the software running inside those machines, and provides users with out-of-the-box configuration and administration capabilities for said software. WebSphere CloudBurst knows how to interact with the software in the virtual machines to do things like federate WebSphere nodes into a cell, create application server clusters, configure environments for optimal performance, apply fixes and upgrades, and more. The best part is you do not need to supply any of your own scripts to do this. In short, the appliance ships with WebSphere intelligence.
Beyond this WebSphere intelligence, WebSphere CloudBurst enables users to create customized WebSphere environments (from the operating system up) and codify those customized environments in the form of patterns. These patterns, which represent your very own WebSphere application environments, enable you to deploy your applications rapidly, repeatedly and with extremely consistent results. In addition, the appliance allows you to define varying roles for users, each of those mapping to traditional data center responsibilities (i.e. customizing the operating system, building application infrastructure, carrying out middleware customizations, etc.). Again, WebSphere CloudBurst was purpose-built with WebSphere environments in mind.
It is not all about comparing and contrasting WebSphere CloudBurst and IBM Systems Director VMControl. In the case that you are using WebSphere CloudBurst to create and manage virtualized WebSphere environments on top of the PowerVM hypervisor platform, IBM Systems Director VMControl is actually a required component. In this scenario, the two offerings are complementary. WebSphere CloudBurst communicates with IBM Systems Director VMControl in order to create and configure the virtualized WebSphere environment requested by the user. This image below depicts how the two products work in conjunction in a PowerVM environment.
I hope this helps to shed light on how WebSphere CloudBurst compares to, contrasts with, and complements IBM Systems Director VMControl. Feel free to reach out to me on the blog or on Twitter (@damrhein) with any questions I did not answer here.
In keeping with the impressive release pace, WebSphere CloudBurst 18.104.22.168 is now available for download from the IBM Support site. In some ways, this release is typical of what you may expect from a service release. In other words, there are defect fixes and other general enhancements in the new version of the firmware. However, this release is a bit more than your typical service release in that there are a couple of major additions of which you should be aware.
First, starting in WebSphere CloudBurst 22.214.171.124, you will be able to provision WebSphere CloudBurst patterns to IBM Power7 systems. We already supported both Power5 and Power6 systems, and this new addition allows you to take advantage of some of the significant enhancements in the IBM Power7 hardware. In addition, this means that from a single appliance you can provision environments to multiple different releases of VMware, IBM z/VM, and IBM PowerVM hypervisor technologies. The best thing about this is that WebSphere CloudBurst provides an effective abstraction layer over the underlying infrastructure so that no matter which of the hypervisor solutions you use, the end-user experience with the appliance remains the same. You get all of this from a single device!
The other major element in WebSphere CloudBurst 126.96.36.199 is the introduction of Environment Profiles. Traditionally, WebSphere CloudBurst controlled most of the pattern deployment process. While this allows the appliance to provide a lot of configuration activity without input from the user, it made some usage scenarios hard to accommodate. For instance, historically you have not been able to assign specific IP addresses to machines in your deployment, and you have not been able to deploy a pattern across multiple cloud groups. Now, with environment profiles you can. Environment profiles give you more control over deployment behavior, including the ability to assign IP addresses (as opposed to WebSphere CloudBurst automatically doing so), deploy parts across multiple cloud groups, and apply virtual machine naming standards. The use of these new resources is completely optional, so you can still use the traditional deployment model, but this provides you with flexibility if you so choose. You can learn more about this new capability by watching the short demonstration here.
As an aside to the above information concerning WebSphere CloudBurst 188.8.131.52, I should also point out new WebSphere Hypervisor Edition announcements detailed here. I encourage you to read the announcement, but to summarize there are two major pieces of information. First, when you buy PVUs of entitlement for WebSphere Application Server Hypervisor Edition or WebSphere Message Broker Hypervisor Edition, those entitlements also apply to WebSphere Application Server and WebSphere Message Broker respectively. You can use the Hypervisor Edition images and traditional software packages in any combination, up to the level of use based on your Hypervisor Edition entitlements. Second, there is a new licensing for WebSphere Application Server Hypervisor Edition called IBM HTTP Server for WebSphere Application Server Hypervisor Edition. This allows you to deploy IBM HTTP Server instances using the WebSphere Application Server Hypervisor Edition without paying for the full Hypervisor Edition license. Again, for more details and term information, please read the announcement referenced previously.
There will be more to come about WebSphere CloudBurst 184.108.40.206, including an article on the use of environment profiles, but I wanted to give everyone a quick heads up. Let me know if you have any questions or feedback for us.
I spent most of my time growing up doing two things, going to school and playing sports. I made many fond memories -- mostly from the latter :) -- and learned more than a few lessons over that time. Of all of those lessons, there was one in particular that stuck out in both the classroom and on the baseball diamond: Sometimes you have to get back to the basics.
In that vein, I think it is time to revisit the basics of WebSphere CloudBurst. In revisiting the basics, I am not talking about the technical basics of the appliance. Rather, I am talking about revisiting exactly why WebSphere CloudBurst exists in the first place. In other words, let's take a look at the problem domains WebSphere CloudBurst addresses, and let's discuss a little bit about how the appliance does so.
In my last post, I concentrated on the new enhancements to WebSphere CloudBurst 220.127.116.11. One of the major new additions was the introduction of Environment Profiles, and I promised a developerWorks article would be forthcoming. The article is now live along with a demo that showcases the capability of environment profiles.
As I mentioned in my last post, environment profiles center around giving you more customization capability during the pattern deployment process. In WebSphere CloudBurst, the pattern deployment process consists of the five main steps depicted below.
Traditionally, WebSphere CloudBurst controlled the entire deployment process, thus closing it off to the deployer. Environment profiles extend the customization reach of users to be able to effect steps 1-3 in the above diagram. Specifically, environment profiles give you the following control:
Control over the assignment of IP addresses and hostnames to pattern parts: Instead of having WebSphere CloudBurst automatically assign IP addresses, and thus hostnames, to virtual machines during deployment, you can explicitly set both values during the deployment process.
Ability to deploy single patterns to multiple cloud groups: Previously, when deploying a pattern you selected a single cloud group and WebSphere CloudBurst deployed all the parts in the pattern to machines within that cloud group. While this may be okay for many cases, other cases may require you to deploy some parts of the pattern to one group of machines while other parts map to a separate set of machines. Before environment profiles, you could accomplish this with multiple patterns. With environment profiles, you can accomplish it with a single pattern.
Ability to supply virtual machine naming standards: As part of deploying a pattern, WebSphere CloudBurst creates one to many virtual machines with distinct names. Environment profiles allow you to supply a naming standard that WebSphere CloudBurst will use when creating the machines as opposed to default naming schemes previously used.
It is important to note that the use of environment profiles is completely optional, and you can continue to use the traditional deployment process, thereby leaving WebSphere CloudBurst in control. That said, the introduction of environment profiles is a direct response to consistent user feedback we received regarding the need for more control during the deployment process. Based on my user conversations, these profiles address many of said needs in an easy to use, straightforward manner. We are, of course, eager to know what you think. As always, you can let me know right here, through email, or on Twitter (@damrhein).
I point this out about script packages because recently I put one together that is not a WebSphere Application Server administration task, but does provide configuration logic common to many WAS deployments. Specifically, I put together a script package that configures an IBM HTTP Server to be a reverse proxy server. This of course, allows clients to send requests to the IBM HTTP Server and have those requests pass through to a specified back-end destination (i.e. a service hosted on WebSphere Application Server) based on URI paths.
The script package is not all that different from many of the ones I put together. It contains a shell script (which provides configuration and orchestration logic) as well as a cbscript.json file that defines the script package's characteristics when I upload it into WebSphere CloudBurst. The notable difference in this script package is that I include a Perl script that modifies the IBM HTTP Server configuration file. This just reiterates the point that you are not limited to only wsadmin and shell scripts within your script packages.
The workings of the script package are quite straightforward. It starts with a call to the shell script that modifies the IBM HTTP Server's configuration file to ensure the loading of a couple proxy modules:
sed -i s/"#LoadModule proxy_module modules\/mod_proxy.so"/"LoadModule proxy_module modules\/mod_proxy.so"/g $HTTP_CONF
sed -i s/"#LoadModule proxy_http_module modules\/mod_proxy_http.so"/"LoadModule proxy_http_module modules\/mod_proxy_http.so"/g $HTTP_CONF
As you can see, the createProxy.pl script accepts a single argument. This argument represents the reverse proxy configuration information provided by the user during deployment. The Perl script parses the single argument and creates the appropriate proxy directives in the IBM HTTP Server's configuration file:
After the invocation of the script above, control returns to the shell script. The shell script restarts the IBM HTTP Server so that the configuration changes take place. The result is an up and running IBM HTTP Server acting as a reverse proxy based on information supplied during deployment. The listings here do not show the full script package, but I hope to have it up on our WebSphere CloudBurst Samples Gallery soon.
If the script above provides some configuration logic you can use, that is good. However, my main point for bringing it up here is to point out that WebSphere CloudBurst script packages can be more than shell and wsadmin scripts that perform WebSphere Application Server configuration tasks. You can use them to do any sort of scripted activity that is essential to your application middleware deployment process. Happy scripting!
Usually when I am discussing WebSphere CloudBurst with clients, the subject of tracking usage comes up. While 'tracking usage' is pretty broad and could apply to any number of things, we often come back to two major concepts. First, users want to be able to track compute resource usage in the WebSphere CloudBurst cloud, as this helps in cloud capacity planning. Second, users want to be able to track usage by individual WebSphere CloudBurst users in order to facilitate chargeback. In both cases, WebSphere CloudBurst provides reports that help you.
When it comes to tracking compute resource usage in your WebSphere CloudBurst cloud, the appliance provides a set of pre-defined reports on the Cloud --> Machine Activity page.
As you can see from the snapshot above, WebSphere CloudBurst provides usage reports for both memory and CPU attributed to either individual hypervisors or virtual machines. In addition, the appliance tracks storage usage by device and IP usage in your cloud. For each report type, you can specify a desired date range and let WebSphere CloudBurst produce a graph showing usage over that time. The below picture shows the report for memory usage by hypervisor over a one month period.
Tracking compute resource usage is certainly important, but if your interests are mostly about using WebSphere CloudBurst to facilitate chargeback, you likely want to know about our user reports. You can find these reports on the Cloud --> User Activity page of the appliance. On this page, you will find a table that lists each user and their usage of virtual machines, CPUs, memory, and storage over a period of time that you specify. Further, you can download a comma separated value file that contains this data for further parsing or processing on your part. The image below shows an example of the user activity table.
In addition to the user usage data provided above, many WebSphere CloudBurst users find that they want to track the amount of time users had running virtual systems deployed through WebSphere CloudBurst. While the appliance does not provide a direct report with this information, you can use this free sample to calculate virtual system duration times. This free tool uses data available in the WebSphere CloudBurst audit log (data you can process to produce any custom report you need), and it calculates virtual system duration time as well as virtual system time attributed to each user. You use the WebSphere CloudBurst CLI to invoke this tool, providing it with your start and end dates for the calculation (you can find further invocation instructions inside the ZIP file containing the tool). The image below shows example output for both the virtual system duration and user virtual system time reports.
'Tracking usage' means many different things to different people and use cases. I hope the above information regarding usage tracking in WebSphere CloudBurst gives you a good idea of what you get out of the box, as well as what you can do by using the audit log (in a similar fashion to the free tool mentioned above). If you have any questions, requests, or feedback, please let me know.
Over time, many of our users learn to effectively leverage WebSphere CloudBurst user roles and fine-grained access controls to map activities and responsibilities in the appliance to the appropriate people and teams within their organization. Using these controls, they are able to define actions that a user or group can take, and they can define the set of resources on which they can take those actions. It is efficient, flexible, and an absolute necessity in many enterprise scenarios.
In some cases though, I talk with users that want a little more control, or probably better put, governance over the actions a user can take within a given role. Most often, this need arises when the discussion of pattern authoring comes up. If you want a user in WebSphere CloudBurst to be able to create patterns, you simply give them the Create new patterns permission. Once you give them that permission, the user can create patterns using both virtual image parts and script packages in the catalog. For many of the users I talk with, this approach suits their needs.
However, in some scenarios administrators want a little more insight and control over how the pattern authors build their patterns. Specifically, they want to ensure that patterns contain only approved virtual image parts and script packages. While you can certainly use the fine-grained access controls of the appliance to expose only the 'approved' virtual image parts and script packages, that alone may not be enough. After all, the definition of what is 'approved' may be different when building a pattern for testing purposes versus one built for production purposes. If the same pattern author builds both of those patterns, fine-grained access controls do not help as much. So, what can you do?
Have I ever told you how much I love the WebSphere CloudBurst CLI? It's powerful, easy to use, and a great automation enabler. It is also the perfect tool for our problem above. If you are looking to enforce certain constraints on WebSphere CloudBurst patterns, I strongly recommend using the CLI as a governance tool.
To provide a concrete example of what I mean, let's take a look at a generic pattern checking script I am working on now (I hope to have this in the samples gallery soon). Consider the case that I want to check that all of my test patterns for a specific application environment contain 1 deployment manager and between 1 and 3 custom nodes. In addition, I want to make sure that the parts for these nodes come from an approved virtual image, and I want to verify that the deployment manager contains the correct application installation script package. With the script I am currently writing, you would start by encapsulating this information in a properties file.
PatternAssertion_1=Customer Processing Test Environments
PatternAssertion_1_Requirements=Deployment manager:1:415:Install customer process app;Custom nodes:1-3:415
In the above, the PatternAssertion_1 key provides a name for the pattern verification assertion. The PatternAssertion_1_Requirements key provides the requirements for the pattern. The above requirements indicate that for a pattern to meet the assertion, it must contain 1 deployment manager part from the virtual image with reference number 415. In addition, the deployment manager must contain a script named Install customer process app. A valid pattern must also contain 1 to 3 custom node parts, also based on the virtual image with reference number 415. When done defining my requirements in the properties file, I simply invoke a script and pass in the file. As a result, I get information about which patterns satisfy or do not satisfy the assertions. For example:
The Customer Process Application pattern satisfied the requirements of the Customer Processing Test Environments assertion.
OR The Customer Process Application pattern did not satisfy the requirements of the Customer Processing Test Environments assertion
due to the following reason: The pattern is required to have a minimum of 1 and a maximum of 3 Custom node part(s), but it had 4.
As I said, I hope to have this sample script posted to the samples gallery soon. I am going through some final revisions and enhancements that I hope make it better and more generally applicable. In the meantime, I wanted to point out that pattern governance is indeed doable, and in fact not very hard to achieve with the CLI. I will be sure to post an update when the sample script is ready. In the meantime, let me know if you have any questions or comments.
The 1.1.1 version of WebSphere CloudBurst is now available on the IBM support site, and you can read a bit about it here. I have not blogged about each and every point release of WebSphere CloudBurst here, but this particular one is significant. The 1.1.1 release adds support for IBM's z/VM hypervisor platform as a deployment target.
Quite simply this means that you can now create virtualized WebSphere application environments on the z/VM platform using WebSphere CloudBurst. This starts by first defining target hypervisors, instances of Linux Master Systems, that WebSphere CloudBurst can communicate with to setup virtual machines on z/VM. Coupled with support for the z/VM infrastructure components, there is a new version of the WebSphere Application Server Hypervisor Edition virtual image. While this new image contains the same basic components as the previous hypervisor edition images, it is packaged for the z/VM platform, and it includes a zLinux operating system.
Once you upgrade to WebSphere CloudBurst 1.1.1, you can define your z/VM infrastructure and use the new WebSphere Application Server Hypervisor Edition image to build custom patterns targeted for the z/VM platform. I put together a demonstration that provides a very brief overview of these new capabilities. As always, please reach out if you have any questions about this or any other WebSphere CloudBurst topic.
One of the most exciting announcements at IBM IMPACT last week was that of the new WebSphere Process Server Hypervisor Edition. This new virtual image allows you to provision complete WebSphere Process Server environments into your on-premise cloud using the WebSphere CloudBurst Appliance. Just like with the other environments you can provision using WebSphere CloudBurst (namely WebSphere Application Server, DB2, and Portal Server), you can stand up these WebSphere Process Server environments in a matter of minutes.
The WebSphere Process Server does not come pre-loaded on the appliance, but it does come with a cool utility that helps you get it on the appliance. The WebSphere Process Server Hypervisor Edition loader provides a wizard-like tool that loads the image into the catalog of an appliance you specify. The tool is simple to use and is included as part of the image package that you download from Passport Advantage.
Not only does the loader above populate the WebSphere Process Server Hypervisor Edition into the appliance's catalog, but it also creates a set of patterns for the WebSphere CloudBurst Appliance. These patterns encapsulate golden topology environments for WebSphere Process Server Hypervisor Edition. At the time of my post, the patterns created by the loader include the following:
Standalone server: This pattern represents a single server instance of WebSphere Process Server. Deployment of the pattern results in a single virtual machine that contains both the server instance and a DB2 instance.
Simulated environment: This pattern contains a single part called a 'Full function control node'. Deployment of the pattern results in the creation of a deployment manager, proxy server, DB2 environment, and three WebSphere Process Server clusters (application target cluster, support cluster, and messaging cluster), all in a single virtual machine.
Scalable environment: This pattern contains a deployment manager, 'Basic function nodes' part, DB2 part, and a proxy server. Deploying the pattern results in the same components as the pattern above, but in this case each component resides in its own virtual machine.
The announcement of the WebSphere Process Server Hypervisor Edition only serves to increase the applicability of WebSphere CloudBurst for constructing on-premise WebSphere clouds. If you have any questions, or want to learn more about this new virtual image, please let me know.
To continue with the series of blog posts regarding WebSphere CloudBurst FAQs, I want to take a look at one aspect of the deployment process.
When you leverage WebSphere CloudBurst to push patterns (complete WebSphere Application Server configurations) into a private cloud, the appliance provides an advanced placement algorithm to determine exactly where the resulting WebSphere virtual systems will reside. It attempts to match the needs of the pattern to the correct set of hypervisors that have been defined. WebSphere CloudBurst considers things like storage, CPU, memory, and high availability characteristics when placing the pattern, and this is all done by the appliance without you having to intervene at all.
This is certainly nice in that it absolves you from having to make such placement decisions. Having said this though, you may be thinking of a question that comes up quite often:
If WebSphere CloudBurst controls the placement of the pattern, how can I make sure that certain deployments end up on certain servers (hypervisors)?
Considering what I just told you above, it may not seem that it's possible to control what machines end up hosting your virtual system since the appliance takes care of that placement for you. However, the organized use of WebSphere CloudBurst cloud groups allows you to take advantage of the intelligent placement provided by the appliance while retaining a level of control over which machines end up hosting particular deployments.
In WebSphere CloudBurst all patterns are deployed to cloud groups. Cloud groups are a collection of hypervisors that have been defined within the appliance. The basic deployment mapping is depicted in the image below:
As seen above, you can create a cloud group for any purpose (dev, test, QA, production, etc.), including any hypervisors that you desire as long as a given hypervisor only belongs to a single cloud group. When you are ready to deploy a pattern, you simply select the cloud group you want to deploy to:
By selecting a cloud group for deployment, you are implicitly selecting the physical machines that will host your deployment. The cloud group could consist of anywhere from one to N hypervisors, so you are afforded the ability to restrict the location of your virtual systems as necessary.
I hope this helped explain a little bit about cloud groups in WebSphere CloudBurst. If you're looking for more information about WebSphere CloudBurst cloud groups, I'd also suggest you watch this video on our YouTube channel.
The ability to package custom maintenance packages and upload them as emergency fixes is perhaps a lesser known feature of WebSphere CloudBurst, but nevertheless something that's been around since the product's initial release. This is a powerful feature that allows you to build your own fix packages that you can then apply the same way you would use WebSphere CloudBurst to apply a PAK file or fixpack shipped by IBM.
Since IBM is delivering fixes and updates to all of the contents within WebSphere Application Server Hypervisor Edition virtual images (including the OS and IBM software components), you may wonder why you would even want to create your own maintenance packages. One reason would be if you switched out the SUSE Linux operating system shipped with the VMware ESX based images in favor of your own Red Hat operating system. In that case you would be responsible for maintenance to the operating system, and custom maintenance packages would be of interest to you. Another scenario where these custom maintenance packages come in handy would be if you created your own customized images that include non-shipped third-party software in addition to the software shipped in the images. If at some point you have the need to fix or update this software in a running virtual machine, custom maintenance packages provide you the vehicle with which to do just that.
What do these custom maintenance packages look like? In short, they are simply archives or ZIP files. The contents of the archive are largely decided by you, but there is one piece of metadata that is necessary if you want to use WebSphere CloudBurst to apply the maintenance. A file called service.xml is inserted into the root of the archive and tells WebSphere CloudBurst critical information about the custom fix archive. Here's an example of a service.xml file:
Most notably, this metadata tells WebSphere CloudBurst what module or script to invoke to apply the maintenance (Command, this executable is supplied by you), what image versions the fix is applicable to (ImagePrereqs), and the location of the working directory on the virtual machine (Location). In addition to the service.xml file and the executable, you can package up anything else, such as product binaries, which are needed to successfully apply the fix/upgrade/maintenance.
If you haven't noticed, this is an extremely flexible mechanism and can be used for just about anything. I should point out that you can only apply a given fix once per virtual machine, so it's not good for something that you want to run repeatedly against a given machine (check out user-initiated script packages instead). Also, there is a 512MB size limit on the archives. Keep these restrictions in mind when you are deciding how to use custom maintenance packages. If you are interested in learning a bit more about custom maintenance packages or other maintenance techniques, check out this article I co-authored along with Xiao Xing Liang from the IBM SOA Design Center in the China Development Lab.
When it comes to building and using WebSphere CloudBurst patterns, people always ask me if I have any best practices. It turns out, I do. In fact, I have a singular piece of advice that wraps it all up: Build WebSphere CloudBurst patterns in a way such that once deployed, there is no after-the-fact, manual configuration for the running environment. That means, build the pattern so that it not only contains all the nodes necessary for your application environment, but it also contains all the configuration necessary for the environment.
Put like this, most everyone I talk to agrees with me. However, they quickly recognize that, absent this really cool integration with Rational Automation Framework for WebSphere, this means they will be writing scripts for many configuration actions and including them in patterns in the form of script packages. For users not familiar with configuration scripting for our WebSphere products, this can be a daunting proposition. But... it shouldn't be!
Recently, I put together a short presentation that lays out an iterative approach for developing script packages for WebSphere CloudBurst. Specifically, the presentation focuses on developing configuration script packages for the WebSphere Application Server (though the general concepts apply to all Hypervisor Edition products equally). I believe this method is useful for anyone, from novice users to WebSphere scripting gurus. The basic process goes something like this:
Identify: Identify the target WebSphere Application Server topology and configuration for your application environment.
Deploy: Build a WebSphere CloudBurst pattern that matches your desired topology and deploy it to your cloud.
Develop and Test: Develop and test your configuration script. Not a WebSphere Application Server scripting ninja? No worries. Use the Command Assistance feature in the WebSphere Application Server v7 administration console. This feature shows you the wsadmin commands that match the actions you manually take in the console. This affords a lower barrier of entry for those not familiar with wsadmin.
Package: Package up the resulting scripts into a script package along with metadata that describes the package.
Modify and redeploy: Load the new script package into your appliance, add it to your pattern, and then redeploy. Upon deployment completion, verify the scripts produce the desired result.
The presentation provides detail on the above steps and walks through an example scenario for this process. I am embedding it below, and I hope it proves useful. As always, feel free to send in any questions or comments.